Improvement in stop mechanisms for warping-machines



T T W I S TU?- Stop-Mechanisms for Warping Machines.

Patented Au g. 25

THE GRAPHIC CO.PHOTD UTH.5$&4-! PMIRK PLACE-NJ- UNITED STATES P TE A QH e THOMAS C. ENTWISTLE, or nEwISToN, iuAINE, ASSIGNOR To HIMSELF AND PAUL WILSON, or MAYNARD, MASSACHUSETTS.

IMPROVEMENT IN STOP MECHANISMS FOR WARPlNG-MACHINES.

Specification forming part of Letters Patent No. 154,466, dated August 25,1874; application filed A July 15, 1874. 1

To all whom it may concern a Be it known that I, THOMAS G. ENTWISTLE, of Lewiston, Androscoggin county, Maine, have invented an Improved Stop-Motion for Warping-Machines, of which the following is threads 00, which extend over the said bar in their passage from the spools to the warp-beam X. Should any one of these threads break, its Wire drops into the path of and stops the movement of the oscillating rod A, this stoppage causing a lever, F, which previously vibrated uponthe fulcrum S, to shift its fulcrum to the point a, and to thus strike a shi per-rod, H, Fig. 3, either directly or throng 1 the medium of a lever, G, which will have the efl'ect of releasing the said shipper-rod, and of thus shifting the driving-belt onto a loose pulley, and stopping the movement of the drivingshaft J and warp-beam X. The Suspended warp-beam X rests upon and is turned in the usual manner by a cylinder, K, on the drivingshaft J, and at one end of the latteris a camwheel, L,,into the groove of which extends a pin or roller at one extremity of a lever, M, hung to the frame of the machine at the point I), and connected at its opposite extremity by a link, (1, to the above-mentioned lever F,

which has its fulcrum at a on the arm P of ..a

two or more additional arms, S, which carry-x the above-mentionedoscillating rod A. On

the lever F, near its upper extremity, is formed a Segment, 0, having a central notch, 6, into which, when the said lever is in line with the arm P, enters a spring-extension, P, of the saidarm. (See Figs. 2 and 3.) The lever F, except under the circumstances described hereafter, is thus prevented from turning independently of the arm P on its fulcrum a, and must vibrate on the fulcrum S with the said arm, forming, in effect, therefore, a part of the latter. A treadle-lever,R, is hung to theframe of the machine at f, and is acted on by a weight or spring, g, which tends to turn it in the direction of the arrow, Fig. 3; and to this lever is pivoted the lower extremity of ashipper-rod, H, which extends upward through a slot in a plate, T,.secured to the frame of the machine, a shoulder, h, on the said rod being maintained in contact with the edge of the slot by the action of a spring, which prevents the elevation of the rod by the weighted treadle-lever. When the shipper-rod is thus depressed the driving-belt will remain upon the fast pulley; but when the said rod is released and elevated to the position Shown in the detached views, Figs. 4 and 5, the drivingbelt will be shifted onto the loose pulley through the medium of Well-known devices, which it has not been deemed necessary to illustratc or describe. The pawl or lever G, before referred to, is hung to the frame of the machine in such a position that its opposite extremities shall be adjacent to the lever F and shipper-rod H. When the machine is in operation the threads at in their passage from the spools to the warp-beam X pass over the bar B, as indicated by the arrow 1 in Fig. 1, and the cam-wheel L imparts a vibrating movement to the lever M, which is transmitted through the link 01 to the lever F, the latter being locked to the arm P by the spring-extension P, and consequently transmitting the same movement to therock-shaft S, its arms S, and the rod A, the motion of the latter being unobstructed so long as the suspended wires D are held up by the threads. Should one of the latter break, however, as represented at m, Fig. 1, its wire D will drop into the path of, and stop the movement of, the oscillating rod A, and this will also prevent the movement of the arms S, rock-shaft S, the arm P, and its Spring-extension P. As the lever F, however, is directly under the control of the camwheel and lever M, it must still continue to vibrate, but its fulcrum will beishifted to the point a, which will cause the spring P to be withdrawn from the notch c in the upper extremity of the saidlever, and its lower extremity to strike either the shipper-rod H or the lever G, according to the direction of the movement, either having the effect of releasing the said shipper-rod, as shown in Figs. 4 and 5, and of thus shifting the belt onto the loose pulley, and of instantaneously stopping the motion of the machine. If a thread breaks while the rod A is moving in the direction of the arrow 2, Fig. 1, the lever E will strike and operate the shipper-rod directly, as.

1. The combination of the shipperrod.H of

a warping-machine with a lever, '11, hung to the vibrating arm P at a, and admitting of being locked thereto, and to which a positive movement is imparted, all substantially as and for the purpose specified.

2. The, arm P-on'the rock-shaft S and its spring-extension P, in combination with the lever F, hung to the outer extremity of the said arm, and having a notch, 0, adapted for the reception of the said spring'extension.

3. The combination, substantially as described, of the lever G with the shipper-rod H andleverF. V I

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS C. ENTWISTLE.

Witnesses:

JOHN B. CoTToN,

CHARLES B. READE. 

